158494644 has 120 divisors (see below), whose sum is σ = 516656448. Its totient is φ = 41160960.

The previous prime is 158494639. The next prime is 158494667. The reversal of 158494644 is 446494851.

158494644 is a `hidden beast` number, since 1 + 584 + 9 + 4 + 64 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 158494644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 21772 + ... + 28124.

Almost surely, 2^158494644 is an apocalyptic number.

158494644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158494644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258328224).

158494644 is an abundant number, since it is smaller than the sum of its proper divisors (358161804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

158494644 is a wasteful number, since it uses less digits than its factorization.

158494644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6387 (or 6376 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 158494644 is about 12589.4655962833. The cubic root of 158494644 is about 541.1755870227.

The spelling of 158494644 in words is "one hundred fifty-eight million, four hundred ninety-four thousand, six hundred forty-four".